73691881 has 4 divisors (see below), whose sum is σ = 73884672. Its totient is φ = 73499092.

The previous prime is 73691879. The next prime is 73691903. The reversal of 73691881 is 18819637.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18819637 = 29 ⋅648953.

It is a cyclic number.

It is not a de Polignac number, because 73691881 - 2¹ = 73691879 is a prime.

It is a super-2 number, since 2×73691881² = 10860986650636322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73691831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95821 + ... + 96586.

It is an arithmetic number, because the mean of its divisors is an integer number (18471168).

Almost surely, 2^73691881 is an apocalyptic number.

It is an amenable number.

73691881 is a deficient number, since it is larger than the sum of its proper divisors (192791).

73691881 is a wasteful number, since it uses less digits than its factorization.

73691881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192790.

The product of its digits is 72576, while the sum is 43.

The square root of 73691881 is about 8584.3975327334. The cubic root of 73691881 is about 419.2501378157.

The spelling of 73691881 in words is "seventy-three million, six hundred ninety-one thousand, eight hundred eighty-one".